Ok I *think* its sorted! Sealed as before, and also think that 1 leak was coming in through the courtesy-light switch - the roof rubber seal stops just above, and there was definitely water getting in to the A pillar. What I DID do though was install a Damp-Proof course!: I made a small hole in the sealing bungs in the floor pans, so if water does get in, it has somewhere to go. the carpet though should be kept dry. Lets see how we get on in the winter!

I've started the as another thread to the general water leaks, though it may be the same thing - I'm getting a water leak in through the A Pillar probably a bit higher up than the door wiring connector. Anyone any idea where this could come from? Thanks

For what its worth, currently driving round like this: so, I've sealed with silicone here:Left Bulkhead: Right bulkhead: and replaced the heater box gasket: have replaced the bung & fixed another here: but I can still find a leak inside here: So remaining is to seal up the cable grommet. Note the amp power lead for my stereo which added to the leak :(